Exo-Terra BioDrain Terrarium Draining Substrate

Exo-Terra BioDrain Terrarium Draining Substrate
- Natural crushed lava substrate
- Instantly creates a water drainage system
- Supports biological filtration for systems with waterfalls or drippers
- Non-organic, will not decompose
- May be used with optional BioDrain Mesh to separate from top-layer substrate
- Ideal for tropical terrariums and paludariums